Frenkel defect is caused due to
The shift of a positive ion from its normal lattice site to an interstitial site
Frenkel’s defect is due to shift of an ion from the normal lattice site (creating a vacancy) and occupy interstitial spaces.
The number of equidistance oppositely charged ions in a sodium chloride crystal is
What is the coordination number of sodium in Na2O?
In zinc blende structure, the coordination number of Zn2+ ion is
In the calcium fluoride structure, the coordination number of the cation and anion are respectively
When a certain crystal was studied by the Bragg technique using X – rays of wavelength 229 pm, an X – ray reflection was observed at an angle of 230 20’. What is the corresponding interplanar spacing? [sin (23020’) = 0.396]
Potassium fluoride has NaCl type structure. What is the distance between K+ and F- ions if cell edge is a cm?
Which defect causes decreases in the density of crystal?
The correct statement regarding F – centre is
Schottky defect in crystals is observed when
An example of a non – stoichiometric compound is